In-tank automatic toilet cleaning device



FIG. 1 is a perspective view of an in-tank automatic toilet cleaning device showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and

FIG. 7 is a bottom plan view thereof.

The cross-lining of elements in FIGS. 1 and 3 is to indicate a contrast in materials. 

The ornamental design for an in-tank automatic toilet cleaning device, as shown. 